Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Dispersive liquid-liquid microextraction combined with laser-induced breakdown spectrometry and inductively coupled plasma optical emission spectrometry to elemental analysis

Full text
Author(s):
Gaubeur, I. [1] ; Aguirre, M. A. [2, 3] ; Kovachev, N. [2, 3] ; Hidalgo, M. [2, 3] ; Canals, A. [2, 3]
Total Authors: 5
Affiliation:
[1] Fed Univ ABC, Human & Nat Sci Ctr, BR-09210971 Santo Andre, SP - Brazil
[2] Univ Alicante, Dept Analyt Chem & Food Sci, E-03080 Alicante - Spain
[3] Univ Alicante, Univ Mat Inst, E-03080 Alicante - Spain
Total Affiliations: 3
Document type: Journal article
Source: Microchemical Journal; v. 121, p. 219-226, JUL 2015.
Web of Science Citations: 19
Abstract

In this paper, two analytical methodologies based on the combination of dispersive liquid-liquid microextraction with inductively coupled plasma optical emission spectrometry and laser-induced breakdown spectrometry, respectively, were evaluated for simultaneous preconcentration and detection of Cd, Co, Ni, Pb and Zn. The microextraction procedure was based on the injection of appropriate quantities of 1-undecanol and methanol into the sample solution containing the complexes formed between metal ions and 1-(2-pyridylazo) 2-naphtol (PAN). The main experimental factors affecting the complexation and the extraction of metals (pH, PAN concentration, salt addition and extractant solvent and disperser solvent volume) were optimized using a multivariate analysis consisting of two steps: a Plackett-Burman design followed by a Circumscribed Central Composite Design (CCCD). Under optimum microextraction conditions, the analytical features of the proposed methodologies were assessed. Accuracy was evaluated by analyzing two certified reference materials, yielding results in agreement with the certified values. Both methodologies were applied to the analysis of a number of beverage samples. (C) 2015 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 11/19730-3 - Cloud point extraction (CPE) and dispersive liquid-liquid microextraction (DLLME) applied in the development of analytical methods for metals preconcentration and spectrometric determination
Grantee:Ivanise Gaubeur
Support Opportunities: Regular Research Grants